EP 3730814 A1 20201028 - BALL SCREW DEVICE
Title (en)
BALL SCREW DEVICE
Title (de)
KUGELROLLSPINDELVORRICHTUNG
Title (fr)
DISPOSITIF DE VIS SPHÉRIQUE
Publication
Application
Priority
JP 2019082058 A 20190423
Abstract (en)
A ball screw device includes a screw shaft having a first screw groove formed on an outer circumference thereof, a ball screw nut having a second screw groove formed on an inner circumference thereof, and a plurality of balls disposed in a spiral ball raceway wherein the first screw groove and the second screw groove face each other. A circulation member is attached to an attachment hole radially penetrating the ball screw nut and a circulation path is formed, the circulation path allowing endless circulation of each of the balls rolling in the ball raceway by short-circuiting between two points of the ball raceway.
IPC 8 full level
F16H 25/22 (2006.01)
CPC (source: CN EP US)
B62D 3/06 (2013.01 - CN); F16H 25/2214 (2013.01 - EP US); B62D 5/0421 (2013.01 - US); B62D 5/0448 (2013.01 - US); F16H 2025/2081 (2013.01 - US); F16H 2025/2096 (2013.01 - US)
Citation (applicant)
JP 2013155845 A 20130815 - JTEKT CORP
Citation (search report)
- [X] EP 1193422 A1 20020403 - PGM BALLSCREWS LTD [GB]
- [XA] US 2012000306 A1 20120105 - CHEN YAN-YU [TW], et al
- [X] JP 2003113921 A 20030418 - KOYO SEIKO CO
- [X] DE 102014110765 A1 20150603 - SHOWA CORP [JP]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3730814 A1 20201028; CN 111824240 A 20201027; JP 2020180625 A 20201105; JP 7326846 B2 20230816; US 11493117 B2 20221108; US 2020340561 A1 20201029
DOCDB simple family (application)
EP 20170834 A 20200422; CN 202010278423 A 20200410; JP 2019082058 A 20190423; US 202016838150 A 20200402